/*
 * Copyright 2020 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.samples.apps.sunflower.viewmodels

import androidx.lifecycle.LiveData
import androidx.lifecycle.MutableLiveData
import androidx.lifecycle.ViewModel
import androidx.lifecycle.asLiveData
import androidx.lifecycle.liveData
import androidx.lifecycle.switchMap
import com.google.samples.apps.sunflower.data.UnsplashRepository
import com.google.samples.apps.sunflower.data.UnsplashSearchResult
import kotlinx.coroutines.Dispatchers

class GalleryViewModel internal constructor(
    repository: UnsplashRepository
) : ViewModel() {

    private val queryLiveData = MutableLiveData<String>()

    val repoResult: LiveData<UnsplashSearchResult> = queryLiveData.switchMap { queryString ->
        liveData {
            val repos = repository.getSearchResultStream(queryString).asLiveData()
            emitSource(repos)
        }
    }

    fun searchPictures(queryString: String) {
        queryLiveData.postValue(queryString)
    }
}
